10221112202221 has 4 divisors (see below), whose sum is σ = 10221131973600. Its totient is φ = 10221092430844.

The previous prime is 10221112202183. The next prime is 10221112202311. The reversal of 10221112202221 is 12220221112201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10221112202221 - 2¹⁵ = 10221112169453 is a prime.

It is a super-2 number, since 2×10221112202221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221112202621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9088831 + ... + 10151308.

It is an arithmetic number, because the mean of its divisors is an integer number (2555282993400).

Almost surely, 2^{10221112202221} is an apocalyptic number.

It is an amenable number.

10221112202221 is a deficient number, since it is larger than the sum of its proper divisors (19771379).

10221112202221 is an equidigital number, since it uses as much as digits as its factorization.

10221112202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19771378.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10221112202221 its reverse (12220221112201), we get a palindrome (22441333314422).

The spelling of 10221112202221 in words is "ten trillion, two hundred twenty-one billion, one hundred twelve million, two hundred two thousand, two hundred twenty-one".